Patient Positioning
Patient seated in front of the examiner, hand palm up resting on a examination table.
Probe Positioning
Place the transducer on a longitudinal planes over the joints and tendons of interest. Do not use any pressure – especially while looking for effusion or using doppler mode. Use dynamic scanning to check the movement of the tendons during flexion / extension or against resistance to check the pulleys.
fdp tendon: flexor digitorum profundus tendon
dij: distal interphalangeal joint
e: effusion
Note: enthesitis of the flexor digitorum profundus tendon in a patient with psoriatic arthritis, effusion without doppler signal in the distal interphalangeal joint